Your battery-powered project is dying because the screen is eating your runtime. This 1.54-inch e-ink panel changes that. A full refresh draws 26.4mW and standby sits under 0.017mW. It holds the last image with zero power, so your device can sleep for weeks and still show the reading when you pick it up. No backlight to burn through – it reflects ambient light, which means it reads fine under a harsh sun or a dim workshop lamp. Viewing angle is over 170°. Black, white, red, plus two shades of grey. SPI interface. Full refresh takes eight seconds
